Posnord isn't striking. They are doing everything else and except servicing tesla.
It’s collective action and should be praised in an age where opaque corporations and oligarchs run everything.
If Starbucks workers go to work all day and serve every customer but Bob, that's not a strike or walkout. Those terms have real definitions.
That doesn't mean it isn't a union activity.
Is your sole problem with the fact that people are calling something a strike, and you personally don't think they should, according to your possibly single-country-centric view of the term, or is there a substantive objection?